What network security monitoring should a small business use?

Something that runs on its own, covers the devices you cannot install software on, and explains its alerts to a generalist. Start with what you already have: switch on the logs and alerts in your firewall, e-mail service and cloud accounts. Then add network detection if you have a local network with servers, printers, cameras or machines. Look for published prices, a free way to test on your own network, deployment from one sensor on a mirror port, and alerts that say in plain words what happened. NetSenX was built for this: core detection on every plan, Free included, one agent on a SPANSPAN: switch port analyser. A switch setting that sends a copy of network traffic to one port, where a sensor can watch it. or TAPTAP: test access point. A small device that copies the traffic on a network cable for a sensor to watch. port per segment, and explanations on every alert. It does not replace endpoint protection or backups.

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